Description

HTML sanitizer is written in PHP, aiming to provide XSS-safe markup based on explicitly allowed tags, attributes and values. In versions prior to 1.5.0 or 2.1.1, malicious markup used in a sequence with special HTML CDATA sections cannot be filtered and sanitized due to a parsing issue in the upstream package masterminds/html5. This allows bypassing the cross-site scripting mechanism of typo3/html-sanitizer. The upstream package masterminds/html5 provides HTML raw text elements (`script`, `style`, `noframes`, `noembed` and `iframe`) as DOMText nodes, which were not processed and sanitized further. None of the mentioned elements were defined in the default builder configuration, that's why only custom behaviors, using one of those tag names, were vulnerable to cross-site scripting. This issue has been fixed in versions 1.5.0 and 2.1.1.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

CNA:  GitHub, Inc.

Base Score:  6.1 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score: N/A

NVD score not yet provided.

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-hvwx-qh2h-xcfj	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	GitHub, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Initial Analysis by NIST 12/16/2022 12:28:19 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:a:typo3:html_sanitizer:*:*:*:*:*:*:*:* versions from (including) 1.0.0 up to (including) 1.0.7 *cpe:2.3:a:typo3:html_sanitizer:*:*:*:*:*:*:*:* versions from (including) 2.0.0 up to (excluding) 2.1.1
Added	CVSS V3.1		NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Changed	Reference Type	https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-hvwx-qh2h-xcfj No Types Assigned	https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-hvwx-qh2h-xcfj Third Party Advisory